CN207300469U - Industrial pipeline dust-precipitating system aluminium powder subsequent explosion explosion suppression device - Google Patents

Abstract

The utility model provides an aluminum powder secondary explosion suppression device for an industrial pipeline dust collection system, which comprises a dust bin equipped with an explosion suppression agent and an automatic powder spraying control valve. A pressure gauge and an air inlet are installed on the dust bin, and a manual valve and an automatic valve are installed under the dust bin. The automatic valve is a solenoid valve and is controlled in chain with the pressure sensor on the industrial pipeline. The utility model adopts sensor chain control, has the advantages of convenient operation and use, can timely and effectively suppress the secondary dust explosion in the test, has a wide application range, and can efficiently solve existing practical problems.

Description

Explosion suppression device for secondary explosion of aluminum powder in industrial pipeline dust collection system

technical field

The utility model relates to the technical field of industrial pipeline dust explosion suppression, in particular to an aluminum powder secondary explosion suppression device for an industrial pipeline dust collection system.

Background technique

In industrial production, in order to avoid the occurrence of "secondary explosion" accidents, explosion vent pipes are generally installed outside the discharge port to guide the explosion to a safe place, and some are also equipped with water spray systems. These explosion-proof measures cannot effectively control the occurrence of secondary explosions, thereby reducing the probability of accidents.

Utility model content

The technical problem to be solved by the utility model is: in order to overcome the deficiencies in the prior art, the utility model provides an industrial pipeline dust collection system aluminum powder secondary explosion suppression device, which can effectively prevent the secondary explosion of dust in the industrial pipeline Explosion, to avoid the expansion of the accident, easy to popularize, can effectively solve the actual problems existing in the factory at present.

The technical scheme adopted by the utility model to solve the technical problems is: an explosion suppression device for the secondary explosion of aluminum powder in the industrial pipeline dust collection system, including an explosion suppression component arranged on the industrial pipeline, and the explosion suppression component includes a The dust bin of the blasting agent, the pressure sensor used to monitor the internal pressure of the industrial pipeline, and the electromagnetic valve connected between the outlet of the dust bin and the industrial pipeline, the electromagnetic valve is electrically connected to the pressure sensor; between the electromagnetic valve and the dust bin There is also a manual valve, which is used to manually connect the dust bin and the electromagnetic valve; the dust bin is provided with an air inlet for connecting the air source and a pressure gauge for displaying the internal pressure of the dust bin. The manual valve adopts a check valve.

Specifically, the industrial pipeline includes a main pipeline, a three-way pipeline and a dust suction hood. The dust suction hood is connected to the inlet end of the main pipeline for sucking dust generated in the factory area. The three-way pipeline is connected to the main pipeline. The explosion suppression component is arranged on the main pipeline. Industrial pipelines are generally not a single pipeline, but are connected by multiple pipelines, generally including a main pipeline and a bypass tee pipeline. More places, in order to fully absorb dust.

Further, the main pipeline is provided with a plurality of explosion suppression interfaces for connecting explosion suppression components. Multiple explosion suppression interfaces are used for backup to meet the needs of various situations.

Specifically, flange connection is adopted between the main pipeline and the three-way pipeline and between the main pipeline and the dust collection hood.

Further, in order to make the connections between the various components tight, gaskets for sealing are provided between the flanges and between the pressure sensor and the main pipeline.

Further, the air inlet is arranged in the middle of the side of the dust bin to ensure that there is a sufficient pressure difference between the dust bin and the industrial pipeline, so that the explosion suppressant is sprayed.

Preferably, the dust bin is a cylinder plus a cone structure. The volume of the dust bin can be selected according to the actual situation in industrial production.

Preferably, the pressure gauge, dust bin, manual valve and solenoid valve are arranged sequentially from top to bottom to form vertical powder spraying and shorten the powder spraying reaction time.

The utility model has the following advantages: 1. It can accurately detect the time and location of the secondary explosion and actively spray the inert explosion suppressant to effectively suppress the secondary explosion. 2. The response speed of the equipment is fast, and it can extinguish the flame at the initial stage of the secondary explosion. 3. The powder spraying method is vertical spraying, and the lag time is short. 4. The equipment is simple and easy to operate and manage. 5. The critical pressure of spraying anti-knock agent can be set by yourself, and the pipeline of each factory can be adapted to local conditions, which is very practical. To sum up, the utility model has ingenious design, high degree of automation, short reaction time, easy operation, and is suitable for actual production in factories.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a schematic structural view of the preferred embodiment of the utility model.

In the figure: 1. Dust bin, 2. Pressure gauge, 3. Air inlet, 4. Manual valve, 5. Solenoid valve, 6. Main pipe, 7. Pressure sensor, 8. Tee pipe, 9. Vacuum cover .

Detailed ways

Now in conjunction with accompanying drawing, the utility model is described in detail. This figure is a simplified schematic diagram, only schematically illustrating the basic structure of the utility model, so it only shows the configuration related to the utility model.

As shown in Figure 1, a kind of industrial pipeline dust collection system aluminum powder secondary explosion suppression device of the present utility model includes the explosion suppression assembly arranged on the industrial pipeline, and the explosion suppression assembly can be installed on any position of the industrial pipeline, In this embodiment, installation on the main pipeline 6 is used for illustration.

The explosion suppression assembly includes a dust bin 1 equipped with an explosion suppressing agent (inert dust is selected as the explosion suppressing agent in this embodiment), the dust bin 1 is a cylinder plus a cone structure, and the pressure gauge 2 is used to display the dust bin 1 internal pressure; a pressure gauge 2 and an air inlet 3 are provided at the upper end of the dust bin 1, and the air inlet 3 is arranged in the middle of the dust bin 1 to ensure that there is a sufficient pressure difference between the dust bin 1 and the explosion pipe 6. To suppress dust injection; the dust bin 1 is connected to the main pipeline 6 through the manual valve 4 and the solenoid valve 5, the manual valve 4 is arranged above the solenoid valve 5, and in order to ensure the normal operation of the device, when the equipment is running, the manual valve 4 It should be in an open state; the main pipeline 6 is provided with a pressure sensor 7; the industrial pipeline is composed of the main pipeline 6, the three-way pipeline 8 and the dust collection cover 9, and the connected pipelines are connected by flanges. Between each sensor and the pipe connection port, between the blind plate and the pipe, use matching PTFE gaskets to seal.

The pressure sensor 7 is connected with the electromagnetic valve 5 through an electric signal. When the pressure in the main pipeline 6 exceeds the preset pressure value, the pressure sensor 7 will send an electrical signal to make the electromagnetic valve 5 open, and spray suppressant gas into the main pipeline 6. Explosion dust. The industrial pipeline is provided with multiple spare interfaces.

It works as follows:

The automatic powder spraying explosion suppression technology mainly detects the pressure signal generated by the explosion through relevant sensors, and sprays the explosion suppression powder through electronic commands, which can effectively suppress the related explosion and ensure the safety of the pipeline. The design of this automatic powder spraying induction system is mainly researched on the pipeline, and its related equipment includes pressure sensor 7, flame sensor, controller, explosion suppression part (including dust, air compressor, solenoid valve 5, check valve, etc.) and so on. In the initial stage of the explosion in the pipeline, the relevant signal generated by the explosion is detected by the pressure sensor 7 installed on the pipeline, and then the explosion signal is transmitted to the control unit in the form of an electrical signal, and the action is issued after the control unit identifies and confirms The command triggers the explosion suppressor, and the explosion suppressor quickly sprays the explosion suppressing powder under the action of internal pressure, forming a cloud of explosion suppressing powder in the pipeline, using the physical and chemical properties of the explosion suppressing powder to suppress the development of the explosion and prevent the explosion along the pipeline. Proceed with diffusion.

Model experiment of explosion suppression device:

The explosion suppression device model is obtained by shrinking the diameter of the actual laboratory pipeline at a ratio of 5:1. The experimental pipeline itself is composed of an experimental straight pipeline with the same inner and outer diameters but different lengths, a tee pipe and a 90° elbow The two ends of each section of pipe are sealed by detachable blind plates, so that it can be disassembled or shortened according to the needs of the experiment, and it is also convenient to carry out closed pipe experiments and semi-open pipe experiments. The total experimental pipeline is about 10.7m long including straight pipeline, 90° elbow and tee pipe. The diameter and thickness are in line with the requirements of GB/T17395-2012 seamless steel pipe size, shape, weight and allowable deviation, and the selected steel pipe material meets the requirements of GB/T8163-2013 seamless steel pipe for fluid transmission. In general, the pressure generated by the explosion test of the experimental pipeline is less than 3MPa, but for the sake of safety, the maximum withstand pressure is designed to be 5MPa. Have a certain number of air intake holes, exhaust holes, pressure sensor 7 holes and vacuum gauge holes etc. on the pipeline used in the experiment, if the orifice is not needed, just tighten it with screws, which is the so-called spare orifice. The connected pipes are connected by flanges. In order to have relatively good airtightness, we use matching models between the connected flanges, between each sensor and the pipe connection port, and between the blind plate and the pipe. The PTFE gasket is used for sealing, and the connection at the opening of the pipe is sealed with raw material tape.

The model pipeline is equipped with a pressure gauge 2 (to display the pressure in the pipeline) and an air inlet 3. The dust bin 1 is connected to the pipeline through the manual valve 4 and the automatic valve, and the dust bin 1 is a cylinder plus a cone structure. The dust bin 1 is equipped with an air inlet 3 and a pressure gauge 2, and the pressure gauge 2 is used to display the internal pressure of the dust bin.

The operation process of the model powder spraying experiment is to open the manual valve 4 of the dust bin 1, open the cover of the dust bin 1, pour in the explosion suppression dust, and pressurize the dust bin 1 with an air cylinder. When the pressure reaches 8kPa, close the valve and tighten the dust. Storehouse 1 cover, open the pipeline air inlet 3 valve, pour pressure into the pipeline, and the opening pressure of the automatic valve is 5kPa. When the pressure rises to 5kPa. Due to the existence of pressure difference, the explosion suppression dust is pressed into the pipeline to complete a powder spraying process.

Inspired by the implementation of the above ideas based on the present utility model, through the above description, relevant staff can make various changes and modifications without departing from the scope of the present utility model. The technical scope of this utility model is not limited to the contents in the description, and its technical scope must be determined according to the scope of the claims.

Claims (8)

1. An explosion suppression device for secondary explosion of aluminum powder in an industrial pipeline dust collection system, characterized in that: it includes an explosion suppression assembly arranged on an industrial pipeline, and the explosion suppression assembly includes a dust bin (1) equipped with an explosion suppression agent , a pressure sensor (7) for monitoring the internal pressure of the industrial pipeline and a solenoid valve (5) connected between the outlet of the dust bin (1) and the industrial pipeline, the solenoid valve (5) is electrically connected to the pressure sensor (7) ; A manual valve (4) is also provided between the electromagnetic valve (5) and the dust bin (1), and the manual valve (4) is used to manually communicate with the dust bin (1) and the electromagnetic valve (5); The dust bin (1) is provided with an air inlet (3) connected to an air source and a pressure gauge (2) for displaying the internal pressure of the dust bin (1). 2. The aluminum powder secondary explosion suppression device for industrial pipeline dust collection system as claimed in claim 1, characterized in that: said industrial pipeline comprises a main pipeline (6), a three-way pipeline (8) and a dust suction hood (9 ), the dust collection hood (9) is connected to the inlet end of the main pipeline (6) for sucking the dust produced in the factory area, the three-way pipeline (8) is connected with the main pipeline (6), and the explosion suppression assembly is arranged on On the main pipe (6). 3. The explosion suppression device for secondary explosion of aluminum powder in industrial pipeline dust collection system according to claim 2, characterized in that: the main pipeline (6) is provided with a plurality of explosion suppression interfaces for connecting explosion suppression components. 4. The aluminum powder secondary explosion suppression device for industrial pipeline dust collection system as claimed in claim 2, characterized in that: between the main pipeline (6) and the three-way pipeline (8) and between the main pipeline (6) and the three-way pipeline (8) Adopt flange connection between the dust collection covers (9). 5. The anti-explosion device for secondary explosion of aluminum powder in industrial pipeline dust collection system as claimed in claim 4, characterized in that: between the flanges and between the pressure sensor (7) and the main pipeline (6) are provided with Gasket for sealing. 6. The explosion suppression device for secondary explosion of aluminum powder in industrial pipeline dust collection system according to claim 1, characterized in that: the air inlet (3) is arranged in the middle of the side of the dust bin (1). 7. The explosion suppression device for secondary explosion of aluminum powder in the industrial pipeline dust collection system according to claim 1, characterized in that: the dust bin (1) is a cylinder plus a cone structure. 8. The explosion suppression device for secondary explosion of aluminum powder in industrial pipeline dust collection system as claimed in claim 1, characterized in that: said pressure gauge (2), dust bin (1), manual valve (4) and solenoid valve ( 5) Set in order from top to bottom.